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Appendix VL

1103

where H is the height of c from- the ground. If the fall were
unresisted, all the weight energy would be lost in impact, but as
it is, some of the energy is given to the wheel, while the portion
lost by impact will be calculated from the weight's velocity.
Consider the velocity of weight and the angular velocity of wheel

to be uniformly accelerated.    Let t = time of fall in seconds,
and % the number of revolutions during fall    Then

revs, per sec.
1    revs, per sec.

12

Average n  =
and Highest n  =

Max. weight velocity v =
where r  bub radius in ins.

The kinetic energy in w when reaching ground = ^~ : and

2<r

the actual energy accumulated in fly-wheel at its highest speed
will be t^H less this kinetic energy, or